package com.zllkj.mm;

import android.content.Context;
import androidx.test.platform.app.InstrumentationRegistry;
import androidx.test.ext.junit.runners.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

/**
 * Instrumentation test, which will execute on an Android device.
 *
 * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
 */
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
    @Test
    public void useAppContext() throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext();

        assertEquals("com.liang.test", appContext.getPackageName());
    }

    @Test
    public static void main(String[] args) throws Exception {
        int[] a = {1, 2, 3, 4};
        for (int i = 0; i < a.length - 1; i++) {
            System.out.print(a[i] + ",");
        }
        System.out.println(a[a.length - 1]);

        String str = "12";

        System.out.println(str.substring(0, str.length() - 1));
    }

}
